I agree, yes there is an element description!
I am not convinced Graham's MIT was in Saturation. I think maybe close, but the problem I see is, if he was in Saturation, the Voltage and Current Waveforms would not be 90 Degrees from each other:
Input Voltage ( Yellow ) and Input Current ( Blue ) would be almost in phase, not a quarter Cycle later. A Quarter Cycle is 90 Degrees and indicated the Core is not Saturated.
So, at Saturation, Inductance is lost, and an LC Resonance Tank Circuit can not be 90 degrees out of phase. The Inductor becomes a Resistive Element, because it has lost all its Inductance L.
Sorry, long winded, but my analysis, is that he is not in Saturation, but is close. I may be wrong and over looked something?
Graham has an interesting machine, yes it is directly related to this topic! But it is done in a slightly different way.
Grahams Partnered Output Coils, should be thought of as two Parallel Wires! Connected in Parallel Series! The Wires have a direct relationship to each other! At anytime the Relationship to each other were to change, so would the Magnetic Fields between them.
Remember, Current is the Magnetic Field!
If the Current between the two Parallel Wires, were to be aloud to change, then there would be a full reversal, which we have seen already. Why a full reversal in Current? Because it must be Equal and Opposite, Faradays Law of Induction with Lenz's Law states this!
This Change, only requires a change is the flow of Current, which is a Conduction related issue!
Break up all the parts of the Cycles seen:
The Area marked in Red is standard Transformer Induction, there is no indication of any overly unusual activity in this region. This region is the Half Cycle, it could be thought of as a negative DC half of the AC Cycle. Power here from Input to Output is Transformer Induction, with losses. The power would look like this:
Marked in Yellow.
Now, marked in Green, the active part of the Action comes:
The power would normally look like this:
Marked in Green. Now we must carefully analyze this, because we only have half of the Power expected, we have a specifically arranged interruption in Conduction at Peak Current, or very close to it.
Important: The Green Trace is the Output Current shown on only One wire:
At the point of the switch:
Marked in Red, the point of the Switch! Also seen, and should be noted, the only kick in the waves seen:
Marked in White, the only kick in the waves seen. Its a negative Kick, a kick that shows a negative pressure on the Input Current ( Blue ). Also important: The Input Current, after the Switch, the amplitude increases over time!
So, what's going on?
- Parallel Output Wires are building in Voltage and Current, the are fully loaded up until the Switch!
- At or close to Peak Current, the Parallel Series Connected Coils are Interrupted, the Conduction on One Coil is Broken...
- What happens now? How can the Current Flip so quickly?
The Green Trace above, shown above to indicate the Positive ( Red ) and Negative ( Black ) swings in the Output Current Trace.
Seen in the middle, is the very sharp change from Positive ( Red ) to Negative ( Black ). This happens in a very short time!
The Coils have a Tension, then the Tension in one Coil is broken, via a switch. One Coil still has a tension, but the other has no current, but the other coil wants to change. The Tension in this coil can not stay where it is.
The Coil that has a broken tension, is conductive via the Mosfet's Internal Diode, but only in reverse. We know that Equal and Opposite Currents must start to flow if there is a Conduction Path!
Question, does the Switch need to be turned back on? If so why?
Graham is using the Tension ( Voltage and Current ) on one Output Coil, to Flip the other Output Coils Polarity, to create equal and opposite Tension ( Voltage and Current ). Bucking Coils! He is using Partnered Output Coils!
Well, we have a reasonable post, nearly out of words...
P.S: Bad images, sorry, I tried to find the best I could but they are not very good for what I am trying to show.